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  1. #14
    Join Date
    May 2002
    Location
    Baton Rouge, Louisiana
    Posts
    4,108
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    Quote Originally Posted by kontrolphreak View Post
    https://www.ccontrols.com/basautomat...sgatewaylx.php

    Creates individual virtual BACnet devices for every Modbus device. If you have a bunch of typical Modbus devices wouldn't be to hard to set up a profile and run with it. They also have a bunch of profiles already created for certain Modbus devices.

    https://www.ccontrols.com/support/ba...x_profiles.htm

    May not be cheaper than re-using the JACEs, but probably quicker than fat fingering in all the Modbus addresses.

    kontrol out
    Just used one of these to do Modbus TCP to Bacnet IP, it was only 4 points but it was really easy.
    Quote Originally Posted by MatrixTransform View Post
    very soon it is you that will be pwned

  2. #15
    Join Date
    Jan 2003
    Location
    USA
    Posts
    5,180
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    Quote Originally Posted by Keith D View Post
    Orion,

    You said "Have they finally let you assign more than two threads per IP port or are you planning on using dozens of different UDP ports, reconfigure everything to pull all this crap in?"

    Could you explain what you meant by this please. It has piqued my interest.

    Keith
    Unless they changed it recently the standard Bacnet driver is limited to only 2 polling threads. So even with a gigabit nic, your going to hit a wall really fast trying to pull in a large number of Bacnet devices. Busy time will max out and your poll rate will will crawl even though your only pulling maybe 10s of kBs of traffic. The work around is to setup a wad of IP ports all on different UDP ports so you can spread it out, or shell out for the Bacnet/OWS license where you can define how many polling threads you want. Using multiple UDP ports kills any peer to peer traffic as they are separate Bacnet sites or all routing would have to be through the PC, which makes a single point of failure.

    My router testing setup is only pulling in ~1K Bacnet points over gigE with 1 sec poll rates and the busy time is 90%+ per port. So it won't take a that much even with reasonable poll rates to hit the limits of 2 threads.

    There is a thread here talking about this and a handful on niag central as well. Just one of the hassles when working with massive Bacnet sites.
    Propagating the formula. http://www.noagendashow.com/

  3. #16
    Join Date
    Jun 2012
    Posts
    357
    Post Likes
    Thread Starter
    Quote Originally Posted by kontrolphreak View Post
    https://www.ccontrols.com/basautomat...sgatewaylx.php

    Creates individual virtual BACnet devices for every Modbus device. If you have a bunch of typical Modbus devices wouldn't be to hard to set up a profile and run with it. They also have a bunch of profiles already created for certain Modbus devices.

    https://www.ccontrols.com/support/ba...x_profiles.htm

    May not be cheaper than re-using the JACEs, but probably quicker than fat fingering in all the Modbus addresses.

    kontrol out
    Thanks. Do you know if it is possible to combine multiple Modbus devices under a single virtual BACnet device? Most of the devices on this site have a handful of points, but there are a couple hundred. They could be placed into logical groups, so that would make the Niagara licensing a little easier to swallow.

  4. #17
    Join Date
    Mar 2016
    Posts
    28
    Post Likes
    Quote Originally Posted by DazWah View Post
    One can use a Moxa MGate MB3180 to do modbus RS485 to IP
    I'm a huge fan of the MOXA products, especially the MGATE series solutions. Extremely flexible and free/easy tools to use to setup and troubleshoot.

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